This is Ask An Expert, where every weekday at 9:20 am, KCBS Radio is giving you direct access to top experts in various fields.

Today: The Trump administration expanded fast-track deportation authority nationwide.

This, as the President has empowered federal immigration authorities to revoke migrants' legal status.

To tell us how these measures are affecting the immigrant population, KCBS Radio news anchor Margie Shafer spoke with Bill Hing, Professor of Law and Migration Studies at the University of San Francisco, author of "Humanizing Immigration.", Founding Director of the Immigration and Deportation Defense Clinic, and Founder of the Immigrant Legal Resource Center.